{
  "manageEntity": {
    "action": "Create",
    "entityId": "1098324838",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":52309,\"entity_id\":236984910,\"body\":\"cool\",\"track_timestamp_s\":30}}",
    "nonce": "0x878b8705c7cb4bf48e14c02d4201c609e3e7d7123daecb47bebffda2650aec75",
    "signature": "0xf3cdd7d2beb39f91562d97921eab26aea537f2d057723bf2d4b02b515b4b4c9321c2a0e96f4f989071222c96622d805e7dfc7c47ed7d61974a4e730ee4d91fda1c",
    "signer": "0x1CE93c43F8574f553E8071e946654066188B61BC",
    "userId": "52309"
  }
}